EP0066841A2 - Verschluss für die Zugangsöffnung einer radiographischen Prüfquelle in einer Leitung oder einem Apparat - Google Patents

Verschluss für die Zugangsöffnung einer radiographischen Prüfquelle in einer Leitung oder einem Apparat Download PDF

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Publication number
EP0066841A2
EP0066841A2 EP82104848A EP82104848A EP0066841A2 EP 0066841 A2 EP0066841 A2 EP 0066841A2 EP 82104848 A EP82104848 A EP 82104848A EP 82104848 A EP82104848 A EP 82104848A EP 0066841 A2 EP0066841 A2 EP 0066841A2
Authority
EP
European Patent Office
Prior art keywords
external
plug
pipe
internal
thread
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP82104848A
Other languages
English (en)
French (fr)
Other versions
EP0066841A3 (en
EP0066841B1 (de
Inventor
Jacques Bobichon
Pierre-Loup Leroy
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Stein Industrie SA
Original Assignee
Stein Industrie SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Stein Industrie SA filed Critical Stein Industrie SA
Publication of EP0066841A2 publication Critical patent/EP0066841A2/de
Publication of EP0066841A3 publication Critical patent/EP0066841A3/fr
Application granted granted Critical
Publication of EP0066841B1 publication Critical patent/EP0066841B1/de
Expired legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
    • G01N23/02—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material

Definitions

  • the present invention relates to a plug for access opening of a radiographic control source in a pipe or an appliance, in particular for the control of welds near this opening.
  • the known plugs for radiographic source access openings are solid bottom, and welded to the corresponding piping or device after control by the radiographic source of the weld (s) to be examined. They are no longer reusable if you want to recheck the welds after a certain operating time of the piping or the device. It would indeed be necessary to eliminate the weld before being able to unscrew the plug, which is likely to degrade the surface of the tube or the device. When we want to carry out a new control, we therefore pierce a new opening in the wall, then close this opening after the control using a new plug, also non-reusable. This is a relatively long and costly operation, and leads to successive drilling of the wall at close points.
  • the object of the present invention is to remedy these drawbacks, and to provide a plug for such access openings which makes it possible to carry out checks by a radiographic source - as many times as desired and in one very short time.
  • the plug according to the invention is characterized in that it comprises an external cylindrical element with an open bottom, with internal thread, welded on the wall of the pipe or apparatus and projecting therefrom, and a cylindrical element internal, solid bottom, with external thread, screwed onto the internal thread of the external element and welded on the lips by its upper edge to the upper edge of the external element, and provided with internal means making it possible to unscrew it.
  • these internal means are constituted by an internal thread of the latter, with a pitch opposite to the pitch of its external thread, and making it possible to unscrew it using a pitch screw of the same direction.
  • the wall 1 of the piping comprises an external surface 2 and an internal surface 3.
  • This piping comprises a weld bead 4 whose compactness is desired to be checked periodically by radiographic control.
  • the wall is pierced with a cylindrical hole 5.
  • a first plug 6 is fixed in the bore 7 of the hole 5, for example by screwing in a thread. It is also fixed to the wall by a circumferential weld 8.
  • the internal part 9 of the fixed plug 6 is provided with an internal thread 10, into which is screwed the external thread of the removable plug 11.
  • the latter is fixed to the fixed plug 6 by a weld on the lips 12.
  • It is also provided with an internal left-hand thread 13 with which an extraction tool can be engaged, constituted by a left-hand screw.
  • the first radiographic control is carried out. Then the probe is removed, grease the external thread of the removable plug 11 using a grease resistant to high temperatures, for example a graphite grease or a silicone grease, and screw this plug into the fixed plug. Then the edges of the two plugs are welded by the lip seal 12.
  • a grease resistant to high temperatures for example a graphite grease or a silicone grease
  • the weld on the lip 12 is eliminated, preferably by grinding, this operation can be very rapid.
  • We engage a key with left-hand thread corresponding to that of the internal thread 13 of the removable plug in this thread then unscrews the removable plug 11 from the fixed plug and removes it. We can then introduce the radiographic probe and carry out the weld control.
  • the probe After carrying out the radiographic control, the probe is removed, screw the removable cap back into the fixed cap, then im mobilizes by a new weld on lips. The operation can be repeated many times.

Landscapes

  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Analysing Materials By The Use Of Radiation (AREA)
EP82104848A 1981-06-10 1982-06-03 Verschluss für die Zugangsöffnung einer radiographischen Prüfquelle in einer Leitung oder einem Apparat Expired EP0066841B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8111367 1981-06-10
FR8111367A FR2507778A1 (fr) 1981-06-10 1981-06-10 Bouchon pour ouverture d'acces d'une source radiographique de controle dans une tuyauterie ou un appareil

Publications (3)

Publication Number Publication Date
EP0066841A2 true EP0066841A2 (de) 1982-12-15
EP0066841A3 EP0066841A3 (en) 1983-08-03
EP0066841B1 EP0066841B1 (de) 1986-09-10

Family

ID=9259333

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82104848A Expired EP0066841B1 (de) 1981-06-10 1982-06-03 Verschluss für die Zugangsöffnung einer radiographischen Prüfquelle in einer Leitung oder einem Apparat

Country Status (8)

Country Link
US (1) US4438784A (de)
EP (1) EP0066841B1 (de)
JP (1) JPS57211537A (de)
BR (1) BR8203366A (de)
DE (1) DE3273143D1 (de)
ES (1) ES273612Y (de)
FR (1) FR2507778A1 (de)
ZA (1) ZA824057B (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2138092A (en) * 1983-04-09 1984-10-17 Ford Motor Co Sealing screw for threaded through bores
CN107061923A (zh) * 2017-03-29 2017-08-18 新兴能源装备股份有限公司 一种压力流体管漏孔焊封方法

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2598807B1 (fr) * 1986-05-13 1988-07-29 Stein Industrie Bouchon pour ouverture d'acces d'une source radiographique de controle dans une tuyauterie ou un appareil
US4982763A (en) * 1989-04-13 1991-01-08 The Babcock & Wilcox Company Plug retainer
JPH0494310U (de) * 1990-12-28 1992-08-17
US5701935A (en) * 1995-12-26 1997-12-30 Maxtech Manufacturing Inc. Protective plug for use in welding of threaded bosses
US8820363B2 (en) * 2010-03-24 2014-09-02 Ina Acquisition Corp. Wedge type plug and method of plugging a lateral line
JP5957421B2 (ja) * 2013-07-02 2016-07-27 三菱マテリアル株式会社 ボイラ水管の厚さ測定方法

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US309975A (en) * 1884-12-30 Cement-pipe connection
US1208355A (en) * 1916-03-29 1916-12-12 Samuel D Nechamkus Lead-pipe-sealing cap.
US1690183A (en) * 1926-12-30 1928-11-06 William D Stoughton Test plug
US2310351A (en) * 1941-02-12 1943-02-09 Mueller Co Stopper for pipes
US2539102A (en) * 1946-06-24 1951-01-23 Bechtel Brothers Mccone Compan Radiographic inspection apparatus
US3412759A (en) * 1966-05-06 1968-11-26 American Vitrified Products Co Pipe stopper
US3412886A (en) * 1966-10-06 1968-11-26 Colella Safety closures for containers
US3451432A (en) * 1967-03-02 1969-06-24 Daniel R Miller Test plug means for fluid conduits
US3814276A (en) * 1972-08-14 1974-06-04 M & T Chemicals Inc Corrosion-proof closure assembly
FR2308758A1 (fr) * 1975-04-24 1976-11-19 Messier Hispano Sa Tirant amovible pour fixation rapide, susceptible d'etre precontraint, et dispositifs de commande et de precontrainte associes
US4153067A (en) * 1977-02-04 1979-05-08 Ray Charles W Method and apparatus for providing removable Service to connections to a high pressure main
US4344460A (en) * 1980-11-28 1982-08-17 Advance Valve Installations Apparatus for plugging a pressure piping system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2138092A (en) * 1983-04-09 1984-10-17 Ford Motor Co Sealing screw for threaded through bores
CN107061923A (zh) * 2017-03-29 2017-08-18 新兴能源装备股份有限公司 一种压力流体管漏孔焊封方法

Also Published As

Publication number Publication date
ZA824057B (en) 1983-04-27
FR2507778A1 (fr) 1982-12-17
EP0066841A3 (en) 1983-08-03
ES273612Y (es) 1984-07-01
FR2507778B1 (de) 1984-05-25
ES273612U (es) 1983-12-16
DE3273143D1 (en) 1986-10-16
JPS57211537A (en) 1982-12-25
EP0066841B1 (de) 1986-09-10
US4438784A (en) 1984-03-27
BR8203366A (pt) 1983-05-31
JPH0228817B2 (de) 1990-06-26

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